USER MANUAL PREVIEW
PTM 535BZ
–
BLUETOOTH AND ZIGBEE GREEN POWER PUSHBUTTON TRANSMITTER
© 2021 EnOcean | www.enocean.com
F-710-017, V1.0
PTM 535BZ User Manual | v1.0 | May 2021 | Page 32/112
4.4
IEEE 802.15.4 MAC payload (ZGP telegram)
The IEEE 802.15.4 MAC payload contains the ZGP telegram data.
ZGP telegram format.
Figure 25
–
ZGP telegram format
The content of the ZGP telegram data field depends on the telegram type (ZGP data telegram
or ZGP commissioning telegram). Some of the fields shown in
above are not used
in all telegram types. These fields are marked in
italics
. The structure of data and commis-
sioning telegrams is described in the subsequent chapters.
4.4.1
Data telegram structure
By default, PTM 535BZ transmits data telegrams. The payload of data telegrams is either 13
byte (Device ID = 0x07, default) or 12 byte (all other supported Device ID) long.
below shows the telegram structure for ZGP data telegrams.
Figure 26
–
Structure of ZGP data telegrams
ZGP data telegrams contain the following fields:
◼
Frame Control (1 byte)
The
Frame Control
field is set to
0x8C
◼
Extended Frame Control (1 byte)
The
Extended Frame Control
field is set to
0x30
◼
Source Address (4 byte)
The
Source Address
uniquely identifies the originator (sender) of ZGP telegrams. This
Source ID is assigned by Zigbee Alliance and cannot be changed by the user.
◼
Sequence Counter (4 byte)
The
Sequence Counter
is a continuously incrementing counter used for security pro-
cessing. It is initialized to
0
at the time of production and incremented for each tele-
gram (data telegram or commissioning telegram) sent. The least significant byte of
the Sequence Counter is used as Sequence Number in the IEEE 802.15.4 MAC Header.